1# SPDX-License-Identifier: GPL-2.0 2 3menu "UML Character Devices" 4 5config STDERR_CONSOLE 6 bool "stderr console" 7 default y 8 help 9 console driver which dumps all printk messages to stderr. 10 11config SSL 12 bool "Virtual serial line" 13 help 14 The User-Mode Linux environment allows you to create virtual serial 15 lines on the UML that are usually made to show up on the host as 16 ttys or ptys. 17 18 See <http://user-mode-linux.sourceforge.net/old/input.html> for more 19 information and command line examples of how to use this facility. 20 21 Unless you have a specific reason for disabling this, say Y. 22 23config NULL_CHAN 24 bool "null channel support" 25 help 26 This option enables support for attaching UML consoles and serial 27 lines to a device similar to /dev/null. Data written to it disappears 28 and there is never any data to be read. 29 30config PORT_CHAN 31 bool "port channel support" 32 help 33 This option enables support for attaching UML consoles and serial 34 lines to host portals. They may be accessed with 'telnet <host> 35 <port number>'. Any number of consoles and serial lines may be 36 attached to a single portal, although what UML device you get when 37 you telnet to that portal will be unpredictable. 38 It is safe to say 'Y' here. 39 40config PTY_CHAN 41 bool "pty channel support" 42 help 43 This option enables support for attaching UML consoles and serial 44 lines to host pseudo-terminals. Access to both traditional 45 pseudo-terminals (/dev/pty*) and pts pseudo-terminals are controlled 46 with this option. The assignment of UML devices to host devices 47 will be announced in the kernel message log. 48 It is safe to say 'Y' here. 49 50config TTY_CHAN 51 bool "tty channel support" 52 help 53 This option enables support for attaching UML consoles and serial 54 lines to host terminals. Access to both virtual consoles 55 (/dev/tty*) and the slave side of pseudo-terminals (/dev/ttyp* and 56 /dev/pts/*) are controlled by this option. 57 It is safe to say 'Y' here. 58 59config XTERM_CHAN 60 bool "xterm channel support" 61 help 62 This option enables support for attaching UML consoles and serial 63 lines to xterms. Each UML device so assigned will be brought up in 64 its own xterm. 65 It is safe to say 'Y' here. 66 67config XTERM_CHAN_DEFAULT_EMULATOR 68 string "xterm channel default terminal emulator" 69 depends on XTERM_CHAN 70 default "xterm" 71 help 72 This option allows changing the default terminal emulator. 73 74config NOCONFIG_CHAN 75 bool 76 default !(XTERM_CHAN && TTY_CHAN && PTY_CHAN && PORT_CHAN && NULL_CHAN) 77 78config CON_ZERO_CHAN 79 string "Default main console channel initialization" 80 default "fd:0,fd:1" 81 help 82 This is the string describing the channel to which the main console 83 will be attached by default. This value can be overridden from the 84 command line. The default value is "fd:0,fd:1", which attaches the 85 main console to stdin and stdout. 86 It is safe to leave this unchanged. 87 88config CON_CHAN 89 string "Default console channel initialization" 90 default "xterm" 91 help 92 This is the string describing the channel to which all consoles 93 except the main console will be attached by default. This value can 94 be overridden from the command line. The default value is "xterm", 95 which brings them up in xterms. 96 It is safe to leave this unchanged, although you may wish to change 97 this if you expect the UML that you build to be run in environments 98 which don't have X or xterm available. 99 100config SSL_CHAN 101 string "Default serial line channel initialization" 102 default "pty" 103 help 104 This is the string describing the channel to which the serial lines 105 will be attached by default. This value can be overridden from the 106 command line. The default value is "pty", which attaches them to 107 traditional pseudo-terminals. 108 It is safe to leave this unchanged, although you may wish to change 109 this if you expect the UML that you build to be run in environments 110 which don't have a set of /dev/pty* devices. 111 112config UML_SOUND 113 tristate "Sound support" 114 help 115 This option enables UML sound support. If enabled, it will pull in 116 soundcore and the UML hostaudio relay, which acts as a intermediary 117 between the host's dsp and mixer devices and the UML sound system. 118 It is safe to say 'Y' here. 119 120config SOUND 121 tristate 122 default UML_SOUND 123 124config SOUND_OSS_CORE 125 bool 126 default UML_SOUND 127 128config HOSTAUDIO 129 tristate 130 default UML_SOUND 131 132endmenu 133 134menu "UML Network Devices" 135 depends on NET 136 137# UML virtual driver 138config UML_NET 139 bool "Virtual network device" 140 help 141 While the User-Mode port cannot directly talk to any physical 142 hardware devices, this choice and the following transport options 143 provide one or more virtual network devices through which the UML 144 kernels can talk to each other, the host, and with the host's help, 145 machines on the outside world. 146 147 For more information, including explanations of the networking and 148 sample configurations, see 149 <http://user-mode-linux.sourceforge.net/old/networking.html>. 150 151 If you'd like to be able to enable networking in the User-Mode 152 linux environment, say Y; otherwise say N. Note that you must 153 enable at least one of the following transport options to actually 154 make use of UML networking. 155 156config UML_NET_ETHERTAP 157 bool "Ethertap transport (obsolete)" 158 depends on UML_NET 159 help 160 The Ethertap User-Mode Linux network transport allows a single 161 running UML to exchange packets with its host over one of the 162 host's Ethertap devices, such as /dev/tap0. Additional running 163 UMLs can use additional Ethertap devices, one per running UML. 164 While the UML believes it's on a (multi-device, broadcast) virtual 165 Ethernet network, it's in fact communicating over a point-to-point 166 link with the host. 167 168 To use this, your host kernel must have support for Ethertap 169 devices. Also, if your host kernel is 2.4.x, it must have 170 CONFIG_NETLINK_DEV configured as Y or M. 171 172 For more information, see 173 <http://user-mode-linux.sourceforge.net/old/networking.html> That site 174 has examples of the UML command line to use to enable Ethertap 175 networking. 176 177 NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please 178 migrate to UML_NET_VECTOR. 179 180 If unsure, say N. 181 182config UML_NET_TUNTAP 183 bool "TUN/TAP transport (obsolete)" 184 depends on UML_NET 185 help 186 The UML TUN/TAP network transport allows a UML instance to exchange 187 packets with the host over a TUN/TAP device. This option will only 188 work with a 2.4 host, unless you've applied the TUN/TAP patch to 189 your 2.2 host kernel. 190 191 To use this transport, your host kernel must have support for TUN/TAP 192 devices, either built-in or as a module. 193 194 NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please 195 migrate to UML_NET_VECTOR. 196 197 If unsure, say N. 198 199config UML_NET_SLIP 200 bool "SLIP transport (obsolete)" 201 depends on UML_NET 202 help 203 The slip User-Mode Linux network transport allows a running UML to 204 network with its host over a point-to-point link. Unlike Ethertap, 205 which can carry any Ethernet frame (and hence even non-IP packets), 206 the slip transport can only carry IP packets. 207 208 To use this, your host must support slip devices. 209 210 For more information, see 211 <http://user-mode-linux.sourceforge.net/old/networking.html>. 212 has examples of the UML command line to use to enable slip 213 networking, and details of a few quirks with it. 214 215 NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please 216 migrate to UML_NET_VECTOR. 217 218 If unsure, say N. 219 220config UML_NET_DAEMON 221 bool "Daemon transport (obsolete)" 222 depends on UML_NET 223 help 224 This User-Mode Linux network transport allows one or more running 225 UMLs on a single host to communicate with each other, but not to 226 the host. 227 228 To use this form of networking, you'll need to run the UML 229 networking daemon on the host. 230 231 For more information, see 232 <http://user-mode-linux.sourceforge.net/old/networking.html> That site 233 has examples of the UML command line to use to enable Daemon 234 networking. 235 236 NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please 237 migrate to UML_NET_VECTOR. 238 239 If unsure, say N. 240 241config UML_NET_DAEMON_DEFAULT_SOCK 242 string "Default socket for daemon transport" 243 default "/tmp/uml.ctl" 244 depends on UML_NET_DAEMON 245 help 246 This option allows setting the default socket for the daemon 247 transport, normally it defaults to /tmp/uml.ctl. 248 249config UML_NET_VECTOR 250 bool "Vector I/O high performance network devices" 251 depends on UML_NET 252 select MAY_HAVE_RUNTIME_DEPS 253 help 254 This User-Mode Linux network driver uses multi-message send 255 and receive functions. The host running the UML guest must have 256 a linux kernel version above 3.0 and a libc version > 2.13. 257 This driver provides tap, raw, gre and l2tpv3 network transports 258 with up to 4 times higher network throughput than the UML network 259 drivers. 260 261config UML_NET_VDE 262 bool "VDE transport (obsolete)" 263 depends on UML_NET 264 depends on !MODVERSIONS 265 select MAY_HAVE_RUNTIME_DEPS 266 help 267 This User-Mode Linux network transport allows one or more running 268 UMLs on a single host to communicate with each other and also 269 with the rest of the world using Virtual Distributed Ethernet, 270 an improved fork of uml_switch. 271 272 You must have libvdeplug installed in order to build the vde 273 transport into UML. 274 275 To use this form of networking, you will need to run vde_switch 276 on the host. 277 278 For more information, see <http://wiki.virtualsquare.org/> 279 That site has a good overview of what VDE is and also examples 280 of the UML command line to use to enable VDE networking. 281 282 NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please 283 migrate to UML_NET_VECTOR. 284 285 If unsure, say N. 286 287config UML_NET_MCAST 288 bool "Multicast transport (obsolete)" 289 depends on UML_NET 290 help 291 This Multicast User-Mode Linux network transport allows multiple 292 UMLs (even ones running on different host machines!) to talk to 293 each other over a virtual ethernet network. However, it requires 294 at least one UML with one of the other transports to act as a 295 bridge if any of them need to be able to talk to their hosts or any 296 other IP machines. 297 298 To use this, your host kernel(s) must support IP Multicasting. 299 300 For more information, see 301 <http://user-mode-linux.sourceforge.net/old/networking.html> That site 302 has examples of the UML command line to use to enable Multicast 303 networking, and notes about the security of this approach. 304 305 NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please 306 migrate to UML_NET_VECTOR. 307 308 If unsure, say N. 309 310config UML_NET_PCAP 311 bool "pcap transport (obsolete)" 312 depends on UML_NET 313 depends on !MODVERSIONS 314 select MAY_HAVE_RUNTIME_DEPS 315 help 316 The pcap transport makes a pcap packet stream on the host look 317 like an ethernet device inside UML. This is useful for making 318 UML act as a network monitor for the host. You must have libcap 319 installed in order to build the pcap transport into UML. 320 321 For more information, see 322 <http://user-mode-linux.sourceforge.net/old/networking.html> That site 323 has examples of the UML command line to use to enable this option. 324 325 NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please 326 migrate to UML_NET_VECTOR. 327 328 If unsure, say N. 329 330config UML_NET_SLIRP 331 bool "SLiRP transport (obsolete)" 332 depends on UML_NET 333 help 334 The SLiRP User-Mode Linux network transport allows a running UML 335 to network by invoking a program that can handle SLIP encapsulated 336 packets. This is commonly (but not limited to) the application 337 known as SLiRP, a program that can re-socket IP packets back onto 338 he host on which it is run. Only IP packets are supported, 339 unlike other network transports that can handle all Ethernet 340 frames. In general, slirp allows the UML the same IP connectivity 341 to the outside world that the host user is permitted, and unlike 342 other transports, SLiRP works without the need of root level 343 privileges, setuid binaries, or SLIP devices on the host. This 344 also means not every type of connection is possible, but most 345 situations can be accommodated with carefully crafted slirp 346 commands that can be passed along as part of the network device's 347 setup string. The effect of this transport on the UML is similar 348 that of a host behind a firewall that masquerades all network 349 connections passing through it (but is less secure). 350 351 NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please 352 migrate to UML_NET_VECTOR. 353 354 If unsure, say N. 355 356 Startup example: "eth0=slirp,FE:FD:01:02:03:04,/usr/local/bin/slirp" 357 358endmenu 359 360config VIRTIO_UML 361 bool "UML driver for virtio devices" 362 select VIRTIO 363 help 364 This driver provides support for virtio based paravirtual device 365 drivers over vhost-user sockets. 366 367config UML_RTC 368 bool "UML RTC driver" 369 depends on RTC_CLASS 370 # there's no use in this if PM_SLEEP isn't enabled ... 371 depends on PM_SLEEP 372 help 373 When PM_SLEEP is configured, it may be desirable to wake up using 374 rtcwake, especially in time-travel mode. This driver enables that 375 by providing a fake RTC clock that causes a wakeup at the right 376 time. 377 378config UML_PCI_OVER_VIRTIO 379 bool "Enable PCI over VIRTIO device simulation" 380 # in theory, just VIRTIO is enough, but that causes recursion 381 depends on VIRTIO_UML 382 select FORCE_PCI 383 select UML_IOMEM_EMULATION 384 select UML_DMA_EMULATION 385 select PCI_MSI 386 select PCI_LOCKLESS_CONFIG 387 388config UML_PCI_OVER_VIRTIO_DEVICE_ID 389 int "set the virtio device ID for PCI emulation" 390 default -1 391 depends on UML_PCI_OVER_VIRTIO 392 help 393 There's no official device ID assigned (yet), set the one you 394 wish to use for experimentation here. The default of -1 is 395 not valid and will cause the driver to fail at probe. 396